/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.server.http.cypher.format.jolt.v1;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import java.io.IOException;
import java.util.Collections;
import java.util.Optional;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.server.http.cypher.format.jolt.Sigil;

final class JoltNodeSerializer extends StdSerializer<Node> {
    JoltNodeSerializer() {
        super(Node.class);
    }

    @Override
    public void serialize(Node node, JsonGenerator generator, SerializerProvider provider) throws IOException {
        generator.writeStartObject(node);
        generator.writeFieldName(Sigil.NODE.getValue());

        generator.writeStartArray();

        generator.writeNumber(node.getId());

        generator.writeStartArray();
        for (Label label : node.getLabels()) {
            generator.writeString(label.name());
        }
        generator.writeEndArray();

        var properties = Optional.ofNullable(node.getAllProperties()).orElseGet(Collections::emptyMap);

        generator.writeStartObject();

        for (var entry : properties.entrySet()) {
            generator.writeFieldName(entry.getKey());
            generator.writeObject(entry.getValue());
        }

        generator.writeEndObject();

        generator.writeEndArray();

        generator.writeEndObject();
    }
}
